Navegando por Autor "BRITO, Licurgo Peixoto de"

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Análise de aproximações das concepções presentes em questões associadas ao ensino de química aplicadas no novo ENEM com as concepções do enfoque CTS
(Universidade Federal do Pará, 2019-06) SOUZA, Jorge Raimundo da Trindade; BRITO, Licurgo Peixoto de
The National High School Examination (Enem) comprehends the evaluation of skills and competences fundamental to the exercise of citizenship, one of the objectives of the Science, Technology and Society (STS) approach. This qualitative research, which also adopts quantitative standards, has the objective of analyzing STS concepts in the issues associated to the chemistry teaching of this exam, in the period between 2009 to 2015 (new Enem), and the factors that influence these relations. For this, it was necessary to analyze the content and the structure of the questions associated to the teaching of Chemistry, examining if and how occurred the approximation of these questions with the principles of the STS educational perspective, and what conditions determine the mediation of this relation of proximity. As an instrument for analyzing the questions, the Discursive Textual Analysis (ATD) was used. Among the 156 analyzed questions, which are pertinent to the teaching of Chemistry, 46.1% did not present an approximation with the principles of the STS approach; 32.1% showed an apparent relationship with these assumptions and 21.8% were associated with the principles of the STS approach. The results showed that the questions of the new Enem presented proximity, at different levels, to the theoretical principles of the STS approach.
Acesso aberto (Open Access)
Educação ambiental em parques ambientais: análise textual discursiva em dissertações
(Universidade Federal de Mato Grosso, 2022-04) PERES, Ariadne da Costa; BRITO, Licurgo Peixoto de; PEREIRA, Marcos Augusto Carvalho
The state of the art has the function of situating the researcher about the production, research and positions on his object of study, an action that guides the research intentions, in this sense, to investigate research on environmental education in environmental parks linked to education scientific field in the field of Science Technology Society and the Environment has relevance for the construction of an education related to the environment that promotes critical debate, the discussion of the contradictory and positioning in the face of scientific advances and environmental disasters on our planet, for that we made a search in three virtual libraries, the first, “Digital Library of Theses and Dissertations” (BDTD); the second “Bank of CAPES Theses and Dissertations” and finally in the “Portal de periodicals CAPES/MEC”, of the 325 works recovered, only two relate to the selected object of study, one dealing with a pedagogical experience in the environmental park-school relationship and another thematizing the training of teachers to work in environmental parks, in these researches we have the critical conception of education that fosters the debate on science, technology and socio-environmental issues, still emerging from the analysis notes for the training of teachers, with this, the research contributes to the critical debate about environmental education and bequeaths us the need for more research related to science education relating schools and environmental parks.
Acesso aberto (Open Access)
As pesquisas em educação em ciências na interface com a educação indigena: a abordagem qualitativa na evidência dos dados
(Universidade Federal de Mato Grosso, 2017-12) OLIVEIRA, Lúcia Helena Soares de; BRITO, Licurgo Peixoto de; KALHIL, Josefina Diosdada Barrera
In this paper we discuss the methodological paradigms used in the last ten years in research in Education in Science and Indigenous Education. We approached the survey carried out in the databases of the Portals of Capes, BDTD and Google Scholar. The study is part of the theoretical basis of a research that is underway within the scope of the Post-Graduate Program in Science and Mathematics Education -REAMEC, by the Federal University of Mato Grosso do Sul, umbrella. This study has a bibliographic character and is supported in the research through surveys carried out in articles, Theses, Dissertations and works of specialists that approach the subject in question. Thus, the studies reflect that the qualitative approach allows the detailed understanding of the meanings and the situational characteristics of the subjects involved, is concerned with a reality that can not be quantified or reduced to the operationalization of variables, emphasizing that the purpose of the scientific research does not is centered only on the presentation of a report or description of the data, but on the report of the interpretative development of the data obtained.
Acesso aberto (Open Access)
Região do espaço que mais influencia em medidas eletromagnéticas no domínio da frequência: caso de uma linha de corrente sobre um semi-espaço condutor
(Universidade Federal do Pará, 1994-07-28) BRITO, Licurgo Peixoto de; DIAS, Carlos Alberto; http://lattes.cnpq.br/9204009150155131
One of the major interpretation problems in geophysics is to determine the region in the subsurface which generates the main part of the signal. In this thesis, the position and size of this region, hereinafter called the main zone, have been found by modelling an electromagnetic system in which the source is an infinite line of electric current, extended over a conductive half-space. The earth has been modelled as a conductive half-space with an inhomogeneity in it as being an infinite layer or a prism of infinite length in the direction of the source line. The signal in the receiver of an electromagnetic system over a conductive homogeneous half-space is different from the one taken over the half space including an inhomogeneity. This difference is a function of the position of the inhomogeneity in relation to the transmiter-receiver system, besides other parameters. Therefore, with the other parameters fixed, there will be a specific position where this difference will maximize. Since this position depends on conductivity contrast, inhomogeneity dimensions and on source frequency, instead of a single position one will have a region where the inhomogeneity will give the maximum contribution to the measured signal. This region is called the main zone. Once the main zone is identified, the targets in the subsurface can be more precisely located. Usually they are conductive parts of the earth with some specific interest. One can facilitate the exploration and reduce production costs if these conductors are well identified during prospecting. A detectability function (∆) has been defined to measure the contribution to the signal due to the inhomogeneity. The ∆ function has been computed using amplitude and phase of the magnetic field components: Hx and Hz which are, respectively, the tangential and the normal to the earth's surface. The size and position of the main zone has been identified using the extremais of the ∆ function, which change with conductivity contrast, and the inhomogeneities' size and depth. Electromagnetic fields for one-dimensional models were calculated using a hybrid form, numerically solving the integrals that were obtained analytically. Two-dimensional models were computed numerically, by the finite elements technique. The maximum values of ∆ function, computed with amplitude of Hx, have been chosen to locate the main zone. This shows more stable results than other amplitude and phase components, both for one and two-dimensional models, when physical properties and geometric dimensions are changed. For the one-dimensional model, where the inhomogeneity is an infinitely extended horizontal layer, the depth of its central plane was found to be po = 0.17 δo, where po is the depth of this central plane and δo is the skin depth for the plane wave (in an homogeneous half-space having a conductivity σ1 equal to that of the backgound, and the frequency w corresponding to the maximum value of ∆ calculatede for the amplitude of Hx). For two-dimensional inhomogeneities, the co-ordinates of the main zone central axis was found to be do = 0,77 r0 (where do is the horizontal distance from this axis to the source) and po = 0,36 δo (where po is the depth of this central axis), with r0 being the source-receiver separation and δo the skin depth in the same conditions as in the one-dimensional case. If the values of r0 and δo are known, it is possible to determine (do, po). Associating each value of ∆ function (calculated using the amplitude of Hx) with the values of d = 0,77 r and p = 0,36 δ for each r and w used to generate ∆, a method to locate the main zone is sugested. The isovalue curves of ∆ are plotted to construct sections of ∆. These sections indicate the conductors position and provide some helpful insight into their geometric forms when the values of ∆ get dose to the maximum.